Heat-exchange apparatus



Feb. 23 1926. 1,574,675

J. G. M KEAN ET AL HEAT EXCHANGE APPARATUS I Filed March 5, 1921 14amI/vLEr 7 5 ifiea'rvq Eor v Patented Feb. 23, 1926.

UNITED STATES 1,574,615 TENT FFICE- JOHN GRAVES MGKEAN', 0F MOUNTVERNON, AND ROBERT FREDERICK. JONES, OF

. GLASGOW, SCOTLANIDV i i U 1 HEAT-EXCHANGE APPARATUS.

Application f led Marohi, 1921. Serial No. 449,813. 1

tively, "at VVesterhill, Mount Vernon Lanarkshire, Scotland, and 11Leven Street, Pollokshields, Glasgow, Scotland, have invented new and;useful Improvements in IIGZtt-EXCllitllf'G 'Apparatus of which thefollowing is a specification.

This invention has reference to improvements in heat exchange apparatusand the like and particularly relates to apparatus for heating liquidfuel and the like. v

According to this invention the apparatus comprises a main heater body,of any suitable shape in cross section, provided with a plurality oflongitudinal passages in each of which two steam pipes are arranged; onebeing located within the other. The diameters of thesetwo steam pipesand of the pass-ages are such that there is an annular space betweeneach inner and outerv steam pipe and between the outer pipe and the wallof the passage containing same.

v The liquid to be heated flows through the annular space between theouter steam pipe and the wallof the passage.

The steam is discharged from the outer steam pipe into a dischargechamber, suitably drained; the arrangement being such.

that condensed steam in the outer pipe does not drip on to the pipes ata lower level but falls direct into the discharge chamber The innersteam pipe does not extend the full length of the outer pipe and theouter pipe does not extend the full length of the passage so that theseoipes 1 may exp-and without the un'desirab e consequence of steamleaking into and mixing with the liquid.

In order that others skilled in the art to which this invention relatesmay properly understand the same we have hereunto -appended'one sheet ofexplanatory drawings in which v Figure 1 is a longitudinal sectionalelevation of the left hand portion, and Figure 2 is a similar sectionalelevation of the right hand portion, of a heat exchange apparatusconstructed according to this invention. A.

complete sectional elevation of the apparatus will be seen if thesetwo'figures are placed side by side with a line A-A (Figthrough theports k ure 1) coinciding with the line AA (Figure 2). v

Figure 3 is a transverse sectional elevation, taken on the line 3,3 ofFigure 1, and looking toward the. right. I

Figure 4 is an end elevation ofthe right hand end of Figure 2, with thecoyer plate removed. a r Referring to these drawings In carrying thisinvention into efiect ,or practice'a heater body a is provided with aplurality of longitudinal passages b which extend from end to end ofsame and which are positioned in concentric rows that is, an innermostrow of passages b is encircled by an outermost or concentric row, all asshown in the drawing. The passages are connected up to each other bypassages 0 and d at each end in such manner as to form a continuous ductwhich extends'inwardly. {One end of the heater a' is provided with acover plate 6 which closes the passages b and the other end of theheater a is provided with a tube plate f fitted with tubes 9 which arear-- ranged one within each passage 12. These tubes vg'do'not extend thefull length of the passage 6 so that they. may expand freely. The endsof the tubes glying within thepassages Z) areclosed, while the other andopen ends of the tubes g-discharge into a chamber h arranged next to thetube plate 7 and formed with a well h suitably drained It will thus beseen that condensed steam in the tubes 'gdoesnot drip on to other tubesat a lower level but falls direct into the chamber h. A steam supply.chamberz' provided with a tube plate 3' is arranged next the chamber hand tubes fitted .to the plate jare arranged one pass ing into eachtube9. These tubes'lc' are openended and do not extend the full length ofthe tubes 9 so that they may expand freely.

- The heater a is provided with a liquid inlet passage and port Z and aliquid outlet 1 the inlet port l and flows intothe first two passages bin the outer row and then through the connecting passages d and fromthese first two passages?) the liquid flows through the connectingpassages a at the other end of the heater into thethird passage b of theseries. From this third passage Z) the liquid flows through the otherpassages b and passages c and d to the outlet passage and ports m. Byreason of the fact that the passages-bare so connected as to' form acontinuous duct extending inwardly from the outer surface of the body ato the center thereof, the temperature of the liquid traversing thesameis gradually increased, reaching a maximum in the .cen-

trally positioned passages 13 just prior to its entrance into theoutletpassages and ports m. An advantage of such method of flow is thematerialeconomies eflected in the heat losses by radiation. The flow ofthe liquid through the passages 5,0, and d may be varied to suitdifferent liquids. For viscous liquids the preferred arrangement is asillustrated, but for other liquids which are not so viscous the flow maybe from the first to the second passage Z) and from the second to thethird and so on instead of through the first and second simultaneouslyto the third.

If desired the first passage 1) (or the first two passages) may be ofgreater diameter than the other passages b.

As illustrated the heater a may be circular in cross section, but, ifdesired, and to suit any particular installation, the heater may berectangular or other shape in cross sectlon and'the arrangement andnumber of passages b may be varied as desired.

, If desired the'i'nlet and discharge passages and ports may be arrangedotherwise than as illustrated, that is, these may be arranged in the endcover 6. A plate a, riding loosely on the tubes may be arranged tofacilitate "the entrance of these tubes lainto the We claim tubes 9.

' 1. A heat exchange apparatus comprising afmam heater body memberhaving a plurality of passages extending therethrough from end to end,the said ends of the body member having recesses connecting the ends .ofthe passages, and end plates secured to the body and enclosing therecesses whereby the said passages are made to constltute a continuousductextendmg toward thecenter of said body member.

2. A heat exchange apparatus comprising a mam heater body member havinga plurality of passages extending therethrough tinuous duct, and tubescarried by one of the end plates and adapted to enter the passages.

3: A heat exchange apparatus comprising sages, recesses in the other endof the member joining the ends of the passages, an end platesecured tothe said other end and enclosing said recesses, and tubes carried by theend plate and adapted to enter the passages.

4. A heat exchange apparatus comprising a main heater body member havinga plurality of passages extending therethrough from end to end, means atthe ends of the body for connecting the ends of-the passages to form acontinuous duct, a chamber at one end of the body having an exhaustopening, a series of ducts extending from said chamber into thepassages, a second chamber, a.

series of ducts extending from second chamber into the said first seriesof ducts, and intake means in the second chamber.

5. A heat exchange apparatus comprising a main heater body member havinga plurality of passages extending therethrough from end to end, means atone end of the body for connecting the ends of the passages,

recesses at the other end of the body joining the ends of the passages,an end plece for the latter end of the body comprising a pair of spacedplates, one adapted to abut the end of the body and to enclose saidrecesses, a series of apertures in each of said plates, a correspondingseries of ducts extending from each series of said apertures into thepassages of the body, the ducts of the outer plate extending into theducts of the inner plate, casing members secured to the end of the bodyand, enclosing the space betWeent-he said plates to form thereof asubstantially closed chamber, and a second chamber outwardly of theouter plate and communicatingwith the apertures therein.

6. A heat exchange device comprising a main body member having aplurality of passages extending from end to end thereof, said passagesbeing positioned to form inner and outer rows, and means for so joiningsaid passages as to form a continuous duct extending inwardly of saidbody member.

7. A heat exchange device comprising a main body member having aplurality of passages extending from end to end thereof, said passagesbeing positioned to form inner and outer rows, heating means positionedin said passages and means for. so joining said passages as to form acontinuous duct extending inwardly of said body member.

8. A heat exchange device comprising a main body provided with aplurality of passages positioned at different distances from the centerthereof, means for so joining said passages as to form a continuous ductextending inwardlyof said body member, telescoping tubes individual toeach passage and adapted to form a continuous duct, and en closuresadapted to receive corresponding ends of said telescoping tubes.

9. A heat exchange apparatus comprising 5 a main heater body memberhaving a plurality of passages extending therethrough from end to end,means at the ends of the body for connecting the ends of the passages toform a continuous duct, a chamber at 10 one end of the body having anexhaust opening, a series of ducts extending from said.

chamber into the passages, a second chamber, a series of ducts extendingfromsaid second chamber into the said first series of ducts, a platehaving perforations adapted to re ceive the ducts extending from saidsecond chamber and positioned in said first mentioned chamber and intakemeans in the second chamber.

JOHN GRAVES MoKEAN. ROBERT FREDERICK JONES.

